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Technological invention has directly or indirectly produced social change in
Technological invention has directly or indirectly produced social change in
游客
2024-02-24
47
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问题
Technological invention has directly or indirectly produced social change in every period of history. The invention of the horse collar in the Middle Ages was a【B1】______technological advance for agriculture; the【B2】______for use at sea so【B3】______navigation in the fifteenth century that it led in the age of【B4】______; and the steam engine was an【B5】______factor in the industrialization of Europe in the nineteenth century.
A discovery is another kind of technological【B6】______. While inventions add something new to a culture, discoveries increase our knowledge of something that already exists. Gravity had always been there, but Newton "discovered" it: be【B7】______how this natural force worked and how its laws【B8】______to falling bodies. This knowledge made possible many new inventions.【B9】______.
Since each invention makes more inventions possible, the speed of technological development tends to accelerate. Benjamin Franklin experimented with electricity in the eighteenth century,【B10】______. In the hundred years since Edison invented the light bulb, the discovery of electricity has led to tens of thousands of inventions, from the internal burning engine to the computer.【B11】______pose some of tile greatest challenges of our time. [br] 【B7】
选项
答案
observed
解析
动词,与空格相关的句意为:重力总是存在的,但是牛顿发现了它,他______这个自然力如何起作用以及它的规律如何应用于下落物体。这两个宾语都是要靠观察才能进行,故此处为observe的过去式。
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